The Château Ramezay is a museum and historic building on Notre-Dame Street in Old Montreal, opposite Montreal City Hall. Built in 1705 as the residence of then-governor of Montreal, Claude de Ramezay, the Château was the first building proclaimed as a historical monument in Quebec and is the province’s oldest private history museum. Over the years, the Château changed owners and functions several times, with Ramezay's descendants selling the manor to the fur-trading Compagnie des Indes.